I too have an irrational fear of dying. I also have an irrational fear that someone is going to come into my home and hurt my family and me. Depending on how severe the mood is I sometimes think that someone is in my house and I search looking for them all over. I just started the meds again, and while I still have those fears, I notice they are getting better. For example, when I have those thoughts I can actually identify that they are irrational. I believe that both therapy and medicine have helped with that.